Silenced rRNA genes are activated and substitute for partially eliminated active homeologs in the recently formed allotetraploid, Tragopogon mirus (Asteraceae)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F15%3A00446339" target="_blank" >RIV/68081707:_____/15:00446339 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1038/hdy.2014.111" target="_blank" >http://dx.doi.org/10.1038/hdy.2014.111</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/hdy.2014.111" target="_blank" >10.1038/hdy.2014.111</a>
Alternative languages
Result language
angličtina
Original language name
Silenced rRNA genes are activated and substitute for partially eliminated active homeologs in the recently formed allotetraploid, Tragopogon mirus (Asteraceae)
Original language description
To study the relationship between uniparental rDNA (encoding 18S, 5.8S and 26S ribosomal RNA) silencing (nucleolar dominance) and rRNA gene dosage, we studied a recently emerged (within the last 80 years) allotetraploid Tragopogon mirus (2n= 24), formedfrom the diploid progenitors T. dubius (2n= 12, D-genome donor) and T. porrifolius (2n= 12, P-genome donor). Here, we used molecular, cytogenetic and genomic approaches to analyse rRNA gene activity in two sibling T. mirus plants (33A and 33B) with widely different rRNA gene dosages. Plant 33B had similar to 400 rRNA genes at the D-genome locus, which is typical for T. mirus, accounting for similar to 25% of total rDNA. We observed characteristic expression dominance of T. dubius-origin genes in all organs. Its sister plant 33A harboured a homozygous macrodeletion that reduced the number of T. dubius-origin genes to about 70 copies (similar to 4% of total rDNA). It showed biparental rDNA expression in root, flower and callus, but not in
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BO - Biophysics
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Heredity
ISSN
0018-067X
e-ISSN
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Volume of the periodical
114
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
356-365
UT code for WoS article
000349671000013
EID of the result in the Scopus database
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